FR2361977A1 - PNEUMATIC PISTON APPARATUS ESPECIALLY FOR IMPACT TOOLS - Google Patents

PNEUMATIC PISTON APPARATUS ESPECIALLY FOR IMPACT TOOLS

Info

Publication number
FR2361977A1
FR2361977A1 FR7725347A FR7725347A FR2361977A1 FR 2361977 A1 FR2361977 A1 FR 2361977A1 FR 7725347 A FR7725347 A FR 7725347A FR 7725347 A FR7725347 A FR 7725347A FR 2361977 A1 FR2361977 A1 FR 2361977A1
Authority
FR
France
Prior art keywords
plate
piston
movable element
covering
pneumatic piston
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
FR7725347A
Other languages
French (fr)
Other versions
FR2361977B1 (en
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Pneutek Inc
Original Assignee
Pneutek Inc
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Pneutek Inc filed Critical Pneutek Inc
Publication of FR2361977A1 publication Critical patent/FR2361977A1/en
Application granted granted Critical
Publication of FR2361977B1 publication Critical patent/FR2361977B1/fr
Granted legal-status Critical Current

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
    • B25D—PERCUSSIVE TOOLS
    • B25D9/00—Portable percussive tools with fluid-pressure drive, i.e. driven directly by fluids, e.g. having several percussive tool bits operated simultaneously
    • B25D9/14—Control devices for the reciprocating piston
    • B25D9/16—Valve arrangements therefor
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
    • B25C—HAND-HELD NAILING OR STAPLING TOOLS; MANUALLY OPERATED PORTABLE STAPLING TOOLS
    • B25C1/00—Hand-held nailing tools; Nail feeding devices
    • B25C1/04—Hand-held nailing tools; Nail feeding devices operated by fluid pressure, e.g. by air pressure
    • B25C1/041—Hand-held nailing tools; Nail feeding devices operated by fluid pressure, e.g. by air pressure with fixed main cylinder
    • B25C1/042—Main valve and main cylinder

Landscapes

  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Portable Nailing Machines And Staplers (AREA)
  • Actuator (AREA)
  • Fluid-Driven Valves (AREA)
  • Check Valves (AREA)
  • Braking Systems And Boosters (AREA)

Abstract

L'appareil selon l'invention comprend : un élément mobile 10 de soupape champignon se terminant par un plateau se composant d'une âme relativement rigide, en forme de disque portant un recouvrement élastique. La face inférieure du recouvrement porte un rebord périphérique qui constitue un joint d'étanchéité en venant porter sur le bord du cylindre 58 du piston 60 lorsque l'élément mobile est en position basse. Le plateau est maintenu par un montage à force dans un évidement de la paroi cylindrique 18 de l'élément mobile. De ce fait, l'âme du plateau et son recouvrement ne peuvent se décoller sous l'action des variations dynamiques de pression de l'air comprimé. Une rondelle 50 et une partie saillante 51 du piston maintiennent un écartement permanent empêchant le piston d'être aspiré par le plateau en cours de remontée. Application, entre autres : pistolets pneumatiques à couler.The apparatus according to the invention comprises: a movable member 10 of a mushroom valve terminating in a plate consisting of a relatively rigid, disc-shaped core carrying an elastic cover. The lower face of the covering carries a peripheral rim which constitutes a seal by coming to bear on the edge of the cylinder 58 of the piston 60 when the movable element is in the low position. The plate is held by a press fit in a recess of the cylindrical wall 18 of the movable element. As a result, the core of the plate and its covering cannot become detached under the action of dynamic variations in the pressure of the compressed air. A washer 50 and a protruding portion 51 of the piston maintain a permanent spacing preventing the piston from being sucked by the plate during ascent. Application, among others: pneumatic casting guns.

FR7725347A 1976-08-19 1977-08-18 PNEUMATIC PISTON APPARATUS ESPECIALLY FOR IMPACT TOOLS Granted FR2361977A1 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US05/715,854 US4098171A (en) 1976-08-19 1976-08-19 Pneumatic piston apparatus

Publications (2)

Publication Number Publication Date
FR2361977A1 true FR2361977A1 (en) 1978-03-17
FR2361977B1 FR2361977B1 (en) 1984-08-03

Family

ID=24875742

Family Applications (1)

Application Number Title Priority Date Filing Date
FR7725347A Granted FR2361977A1 (en) 1976-08-19 1977-08-18 PNEUMATIC PISTON APPARATUS ESPECIALLY FOR IMPACT TOOLS

Country Status (7)

Country Link
US (1) US4098171A (en)
JP (1) JPS5324685A (en)
AU (1) AU507389B2 (en)
DE (1) DE2737327A1 (en)
FR (1) FR2361977A1 (en)
GB (1) GB1532158A (en)
IT (1) IT1079889B (en)

Families Citing this family (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4391293A (en) * 1980-12-18 1983-07-05 General Signal Corp. Packing for equalizing reservoir cut-out valve
JPS62143503U (en) * 1986-03-06 1987-09-10
US4763562A (en) * 1986-10-20 1988-08-16 Haytayan Harry M Poppet valve with improved seal for pneumatic fastener driving apparatus
DE29508658U1 (en) * 1995-05-24 1995-07-27 Joh. Friedrich Behrens AG, 22926 Ahrensburg Driver for fasteners
US5899435A (en) * 1996-09-13 1999-05-04 Westinghouse Air Brake Co. Molded rubber valve seal for use in predetermined type valves, such as, a check valve in a regenerative desiccant air dryer
US20030057248A1 (en) * 1999-09-10 2003-03-27 Bruins Roger C. Automatic washer feeder for automatic nailer
US6779700B2 (en) * 2000-02-18 2004-08-24 National Nail Corp. Cap assembly and cap feeder for automatic fastener driver
TWI223207B (en) * 2002-08-16 2004-11-01 Pts Corp Method of determining relative z-ordering in an image and method of using same
US20070282262A1 (en) * 2006-05-19 2007-12-06 Alcon, Inc. Surgical system having integral pneumatic manifolds
US20070270746A1 (en) * 2006-05-19 2007-11-22 Alcon, Inc. Surgical system having pneumatic manifolds with integral air cylinders
US9180232B2 (en) * 2006-05-19 2015-11-10 Novartis Ag Surgical system having manifolds with integral pneumatic accumulators
CN104781594B (en) * 2012-10-30 2016-12-21 Smc株式会社 Closed type three-way valve

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2593740A (en) * 1949-08-06 1952-04-22 Maytag Co Valve sealing assembly
US3094900A (en) * 1956-12-27 1963-06-25 Fastener Corp Fastener driving apparatus
DE2213188A1 (en) * 1971-04-28 1972-11-09 Textron Inc., Providence, R.I. (V.StA.) Pneumatically operated device for driving fastening elements
DE2236352A1 (en) * 1972-07-25 1974-02-14 Behrens Friedrich Joh COMPRESSED AIR DEVICE FOR DRIVING NAILS, STAPLES OR THE LIKE
FR2218514A1 (en) * 1973-02-20 1974-09-13 Itt

Family Cites Families (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US125532A (en) * 1872-04-09 Improvement in compressiom-vaives
US1352735A (en) * 1918-10-18 1920-09-14 Henry C Egerton Valve member, &c.
US1382408A (en) * 1920-08-19 1921-06-21 John H Bullen Pump-valve
US1800185A (en) * 1928-09-06 1931-04-07 Homer A Thrush Pressure relief valve
US2397269A (en) * 1943-10-19 1946-03-26 Adel Prec Products Corp Composite valve member
DE1218242B (en) * 1963-02-20 1966-06-02 Danfoss As Valve with a closing piece made of elastic material
US3331391A (en) * 1964-06-01 1967-07-18 Grinnell Corp Check valve clapper construction
US3512454A (en) * 1968-01-02 1970-05-19 Swingline Inc Air return mechanism for a fastener driving machine
US3952398A (en) * 1970-08-31 1976-04-27 Haytayan Harry M Process for pneumatically impelling a hammer to drive a nail into a substrate
US3764104A (en) * 1971-03-15 1973-10-09 W Kempton Expansion compensating dispensing valve
JPS4915299U (en) * 1972-05-16 1974-02-08
GB1510752A (en) * 1975-02-05 1978-05-17 Haytayan H Pneumatic fastener driving or impacting apparatus

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2593740A (en) * 1949-08-06 1952-04-22 Maytag Co Valve sealing assembly
US3094900A (en) * 1956-12-27 1963-06-25 Fastener Corp Fastener driving apparatus
DE2213188A1 (en) * 1971-04-28 1972-11-09 Textron Inc., Providence, R.I. (V.StA.) Pneumatically operated device for driving fastening elements
DE2236352A1 (en) * 1972-07-25 1974-02-14 Behrens Friedrich Joh COMPRESSED AIR DEVICE FOR DRIVING NAILS, STAPLES OR THE LIKE
FR2218514A1 (en) * 1973-02-20 1974-09-13 Itt

Also Published As

Publication number Publication date
GB1532158A (en) 1978-11-15
DE2737327C2 (en) 1987-09-10
FR2361977B1 (en) 1984-08-03
AU507389B2 (en) 1980-02-14
DE2737327A1 (en) 1978-02-23
IT1079889B (en) 1985-05-13
US4098171A (en) 1978-07-04
AU2672177A (en) 1979-01-11
JPS5324685A (en) 1978-03-07

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Legal Events

Date Code Title Description
ST Notification of lapse